The unit of thermal diffusivity is
A.m/hr
B.m2/hr
C.m/hr?C
D.m2/hr?C
E.kcal/m2-hr
Category: Chemical Engineering Mcqs
Ammonium nitrate is manufactured by
A.the oxidation of ammnia
B.reacting liquid ammonia and 60% nitric acid
C.the oxidation of 60% nitric acid
D.reacting liquid ammonia and 98% sulphuric acid
The mass number of an element is 40 and atomic number 20. The ratio of neutrons to protons is
A.1:10
B.1:20
C.2:10
D.none of the above
The chemical formula of metaphosphoric acid is
A.H4P2O7
B.HPO3
C.H3PO3
D.H3PO4
The process of setting cement under water is essentially
A.an oxidation process
B.a reduction process
C.a double decomposition process
D.a hydration process
The process of removal of oil from oil cakes is known as
A.Leaching
B.Decoction
C.Osmosis
D.Soret effect
Edeleanu process is used
A.to reduce aromatic content of kerosine
B.to reduce paraffinic content of kerosine
C.to reduce naphthenic content of kerosine
D.to increase aromatic content of kerosine
The chemical formula of urea is
A.NH4.COO.NH2
B.NH2.CO.NH2
C.NH3.CO2.NH3
D.NH2.CO.NH.CO.NH2
Air is
A.a gas
B.a mixture of gases
C.a mixture of gases and vapour
D.a mixture of vapours
Absolute zero is
A.0?C
B.0?F
C.0?R
D.0?K
E.273?C
